Home / 261.40-391.96-180.32

Finding the Fourth Proportional to 261.40, 391.96 and 180.32

Calculator

Solution

The fourth proportional to 261.40, 391.96 and 180.32 is: 270.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.40 : 391.96 = 180.32 : x
  2. Step 2: Convert to fraction form
    261.40/391.96 = 180.32/x
  3. Step 3: Cross multiply
    261.40x = 391.96 × 180.32
  4. Step 4: Simplify right side
    261.40x = 70,678.23
  5. Step 5: Solve for x
    x = 70,678.23/261.40
  6. Step 6: Final answer
    x = 270.38

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.